How to use the audioplayer timer function with a GUIDE GUI

I designed a GUI with GUIDE that plays an audio file and plots its waveform. I then wanted to go a little bit further and add a line that tracks across the waveform as the file plays. I know in principle that I can use the "currentsample" property of audioplayer and a callback function containing a plot function to accomplish this, and in fact I can make this work outside of GUIDE. However, I don't understand how to tell a callback function inside of a GUIDE GUI to plot to, say, handles.axes1. What I am finding is that the callback function cannot see the typical "handles" structure that GUIDE GUIs use, and I cannot seem to pass the handles structure to the callback function in the usual way.

In brief, my question is: is there a way to utilize an audioplayer timerfcn within a GUIDE GUI? I would bet that it's possible, I just don't fully understand the data handling process to make it work.

[Daniel Shub]

There are a number of ways of doing this. You need to provide a little bit more about how you are trying to accomplish it. Specifically, how is the audioplayer object being created?